Collapsible core



March 1929- o. J. KUHLKE 1,704,292

COLLAPSIBLE cons v Filed Nov. 1924 3 Sheets-Sheet INVENTOR.

0770 J Ail/11x5.

March 5, 1929. U E 1,704,292

COLLAPSIBLE cons Filed Nov. 5, 1924 3 Sheets-Sheet 2 I N VEN TOR.

0770 f Aim/1A2".

. ATT RNEY.

March 1 9- o. J. KUHLKE 1,704,292

COLLAPSIBLE cons 7 Filed Nov. 5, 1924 3 Sheets-Sheet 3 INVENTOR.

0270 J fours.

of core sections is at its outer or inner limits o'l n'ioveinent, respectively, thereby locking the sections in the position described.

When the pinion 17 is rotated in the manner described in bringing the core to collapsed position, the group of sections w ll move relatively to the supporting shalt a will lift the tire away fI'OHlliliG key see-ion, the unit rotating; partially,rh1e to the cue Vatureof the plate 3, so that its plane iutersects the original core plane, the degree of turning); movement being, s ch that lrey section will e appr x'niuloly par to and will lie between the sections 10 and 12 when they are collapsel in the manner to be described.

The sections 10 and 12 are connected to the rigid section 11 by means of inclined hinges 22, so that, when these sections are freed of the hey section, they can be folded inwardly to form an approximate helix with the secti n 11. "he angular posi .on of the hinges 22 is such that the sections 10 e 12 will clear the section t and will lie on either side thereof in collapsed position.

This is illustrated in Figure 3 of the draw ing's. The fee ends of the sections it) and 12.1nay be provided with keys which are received in soclz ts or iaeyways in the ends of the section l.

It will be observed that there has been 7 provided a group of sections which together having xplained the primary featui u ()1 the inveu ion, its specific embodiments may be eonstrtutiid in other terms than ll shown and described.

It will be umlerstood that certain ciplcs oil? the. invention may be applied to tire building lorrns oi" Various shapes and cr ss sections, not beingnee =rily limited to the rounded core section sue-Wu Ll here the term core is used throughout he specification and claims, it will be understood that this term is used broadly and may cover any tire building form.

lVhat is claimed is l 1. In a collapsible form constriction, a key section, means for securing: he

ion in fixed relation to the form support, and a group of form sections, means for 1HOV- ing the group of form sections toward and r '7 i l 1 .L i 1 i A 7 about an axis rather to all ll ilizl.

In a collapsible core construction, a stationary key section and a group of cor:

1 sections which comprises a rigid Htlfllilll and a swinging section which engulurlr pivoted thereto, and means to? moving the group of core sections andsiniultaneously rotating the group about an axis radial to the form.

l, In a collapsible core constrmufion. a stationary key section and a group oit tions which comprises a rigid sectioi two angularly pivoted swin 'iug and means for noting the group or sections and simultaneously rotating plane thereof so that the angularly pivoiei sections in collapsed poi tion will lie 7 proximately parallel to the key section and on opposite sides thereof.

5. in a collapsible core constru section and a group of core so comprises two angularly pitmte 4. sections, the key section and the sections being relatively rotatable the angularly pivoted sections in col-owed pos tion will lie approximately pe 'al to th e lrey section and on opposite sides thereol. 6.111 a collapsible core construction, a key section and a group of core sections crinprising a riv-id section and a swinging section and 111. to move the group of sections and rotat it so that the plane thereof ii'itcrsects the orig core plane.

'7. In a (willapsible form construction, :1 form sl t plate secured thereon, the plate havi. pertial spi 'al tr'st therein, a group 0': Fill sections, and a slide morable over the plate to which the group is attached.

8. In a collapsible core construction, a core shaft, a support secured thereon, a he; section carried on the end of the support, a group of core sections, a slice movable over the support, the group of sections being 'arri i. by the slide, and means to impart a twisting); movement to the 1 cup of sections to cause the plane thereo't to intenxwt the original core plane.

OTTO J. KUHLKE.

1 ill) 

